This series of videos is an introduction to the Gaia GPS app. They show how to find your location, orient the map, record a track and plan a route. To print a map use caltopo.com. Columbia River Orienteering Club has an excellent video that introduces CalTopo and if you are experienced with GPS apps there is a more advanced introduction to Gaia GPS.
Sharon Young, Sierra Club Chapter Outing Leader walks you through the fundamentals of the GAIA app in these easy to follow videos